Boiler.



G. J'. SCHANZ.

BOILER.

APPLICATION FILED NOV. 2l, 1912. 1,069,583. Patented Aug. 5, 1913.

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TTORNE Y.

G. J. SGHANZ.

BOILBR.

APPLICATION FILED NOV.21,1912.

1,069,583., Patented Aug.5, 1913.

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ATTORNEY.

GEORGE tr. scH'ANz, or ERIE, PNNSLVANIA, ASSIGNGR or aun-HALF To M. M. Macau-tierna, or ERIE, PENNSYLVANIA.

IBOIJER.

Speciicatiun df Letters Patent.

Patented Aug. 5,1913.

To all whom i may concern Be it known that I, GEORGE J. SC'HNZ, 'a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Boilers, of which the following is a specification.

Thisinvention has reference to an improved boiler .construction which is of a type that combines certain features of the water tube apparatus and the use of a lirev `box` and flues inconjunction therewith.

The first of the objects of the invention,- is the provision of an apparatus of the character referred to, which will give a maXin mum of efficiency and will at the same time be simple in construction so that it may be built at a moderate cost andy will have its severallparts all easily accessible for cleaning and repairs', andwill be capable of giving satisfactory results in the hands of even comparatively inexperienced firemen.

The above, as well as such other objects as may hereinafter appear, I attain by means of aconstruction which I have illustrated in preferred form in the accompanying drawing wherein- Figure 1 is a longitudinal vertical sectional view through a boiler embodying my improvement; Fig. 2 is an end elevation; Fig. 3 is a sectional view taken on the line III-III of Fig. 1, and Fig. t is a sectional view taken on the line IV-IV of Fig. 1,v

indicating a portion of the water tubes employed.

Referring now more particularly to Fig. 1, it will be seen that I have therein indicated a boiler construction composed fundamentally of three drums, the lower one marked 5 having a considerable length, and the upper ones marked 6 and 7 being locate in position above the lower drur'nl, number 6 being near the front end and 7 near the rear end of the lower drum.

lThe lower drum 5 is set in an inclined position as indicated, and inI the lower end, toward the front, I provide a firebox 6 which is preferably ofthe usual corrugated formationsknown as the Morrison type, although other types might be used if preferred. The grate is indicated at 9, and there is provided at 10 a refractory wall or partition that extends part of the way upward in the firebox in order to properly direct the heat and the products of combustion.

Connecting the fluesheets shown at 11, with the'end wall 12 of the drum 5 I provide a number of flues 13, as clearly shown in Fig; l, and the ent-ire lower portion of the structure is inclosed by the sheets 14 andI the top sheet '15.

Connecting the drum 5 with thel drum 6 which is located above the forward end of the drum 5, I provide a large tube or vertically disposed drum 16, and also a plurality of water tubes 17 arrangedwith an outward curvature as indicated in Fig. 4, and in positionk to ,be acted upon to the best advantage by thevblow of the hot gases and the product's of combustion. The drum 7 which is located above the rear end of the drum 5 is connected with the said drum 5 in a similar manner, by a large vertical passage or drum 18 and a series of water tubes 19, which latter are also preferably formed as indicated in Fig. l and so located as to be operated upon to the best advantage by the products o combustion and the heat of the gases as they pass around the same.

Connecting the drums 6 and 7 in the man-l ner shown in Fig. 1, I provide a plurality of tubes 20 at the upper portion of the said drums, and other tubes preferably somewhat larger in diameter marked 21 which are along the lower portion of the drums, and between the drums I place the battle wall 23 in the position shown and extended upward to a point below the top of the boiler, but preferably above the water level or the normal water line, so that the iow of the gases and the hot products of combustion will be in the direction indicated by the arrows and pass u around the end of the tubes 20 and 21 an over the bailie wall 234and down around the tubes 20 and 21 at their left ends. and around the tubes 17 nd vertical drum 16 andOut of the stack 24 It will be cleartha't the steam in the tubes 20 connecting the steam spaces of the drum 6 and 7, will be superheated by the passing of the products of combustion over the baffle wall 23.

B making the tubes 21 of larger diameter permit freer circulation of the water in the boiler, since the tubes 21 are located in the lower part and the water line extends upward to about the point where the smaller group of tubes commences. The circulation vof the water in the boiler is indicated also by Atube or drum 16, back to the Hrebox, except in so far as a portion. will pass through the vertical vwater t-ubes 17 and 19 in a like cycle of movement whereby the efficiency of the apparatus is materially increased.

In orderto draw off the steamv from the tubes 20 at the hottest portions thereof, I provide a header or connection 24 from which the outlets or supply pipe for live steam leads past the valve 25, and to said header 24 I connect a series of small tubes 26 that extend inwardly to the several tubes 20, but are of considerably smaller diameter than the latter, and are open at the points l27 which are preferably at about the middle portions -of the tubes 20 and just above the baffle wall 23, asI find such place lto 'be approximately the location of the hottest portion of the steam. The header 24 is preferably segmental in shape as indicated by the dotted outline shown in Fig. 3, and there are connected with` the same a large number of the inner tubes 26, so as'to supply ample facility for free flow of steam to the outlet pipe leading past the pipe 25.

In order to provide a convenient means ofaccess to the interior of the lower drum 5 I prefer to make the upright tubular connections 16 and 18 of considerable diameter, as is relatively shown on Fig. 1 of the drawing. The drums 6 and 7 are provided with manhole. devices marked 28 and 29 respectively.

From the above described operation it will be clear that the tubes 2O constitute in -effect a superheater apparatus forming connection between the two upper drums 6 and 7 above the plane of the water tube connections formed by the larger tubes 21, and therefore my apparatus presents in combination with the Hue boiler located below, a pair of drums-one located approximately above each end of the Hue boiler-and con.- nections between the said drums and the Hue boiler or lower drum 5 with the combination superheater connection and water tube connection between the two upper drums, and by said arrangement of parts together with the tubes 26 I attain a very high degree of eHiciency.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is the following:

1. A boiler comprising in combination, a

. lower drum having a Hue with a grate therein in its front portion and fire tubes leading from the Hue throu h the rear portion of the drum, a pair o drums above the lower drum and communicatin therewith, a plurality of tubes connecting he two upper drums, a bridge wall between the lower drum and the 'intermediate portion of the plurality of tubes, and a discharge outlet for the gases of combustion to the front of the said bridge wall..

2. A boiler comprising in combination, a lower drum having fire tubes leading 'therethrough, a furnace for supplying v,heatedl gases through the tubes, a pair of drums above the lower drum and communicating therewith, a plurality of tubes. connecting the two upper drums, a bridge wall between the lower drum and the intermediate portion of the plurality* of tubes, and a discharge outlet for the gases of combustion to the front of the said bridge wall.

3. A boiler comprising in combination la lower drum having a Hue with a '.ate therein in its front portion and fire tu s leading from the Hue through the rear portion 'of the drum, a pair of .drums above the lower drum and communicating therewith, 'a rplurality of steam tubes and water tubes connecting the two upper drums, a bridge wall between the lower drum and the intermediate portion of the plurality of tubes, and a dischar e outlet for the ases of combustion to the ront of the said rid e wall.

4. A boiler comprising 1n combination, a lower drum having tubular means extending therethrough andsurrounded by the water in the drum, a furnace for supplying heated gases through the tubular means, a pair of drums above :the lower and communicating therewith, a plurality of steam tubes connecting the two u per drums, an outlet steam pipe leading rom said steam tubes, a bridge wall between the lower drum and the intermediate ortion of the plurality of tubes, and a disc arge outlet for the gases of combustion to the front of the said bridge wall.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

GEO. J. SCHANZ.

Witnesses:

J. H. DURFIELD, HARRY C. CUSTER. 

